Palaeomagnetic dating and determination of tectonic tilting: A study of Mesozoic-Cenozoic igneous rocks in central West Portugal
Samples of igneous rocks (36 sites, 218 samples) associated with two main phases of the evolution of the Lusitanian Basin can be dated magnetically to latest Jurassic-early Cretaceous or late Cretaceous-Eocene. Directions of remanence in rocks belonging to the older phase require a 35° rotation to b...
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | SER |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03058719_v105_n_p111_Pereira |
| Aporte de: |
| id |
todo:paper_03058719_v105_n_p111_Pereira |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_03058719_v105_n_p111_Pereira2023-10-03T15:21:58Z Palaeomagnetic dating and determination of tectonic tilting: A study of Mesozoic-Cenozoic igneous rocks in central West Portugal Pereira, J.L. Rapalini, A. Tarling, D.H. Fonseca, J. Samples of igneous rocks (36 sites, 218 samples) associated with two main phases of the evolution of the Lusitanian Basin can be dated magnetically to latest Jurassic-early Cretaceous or late Cretaceous-Eocene. Directions of remanence in rocks belonging to the older phase require a 35° rotation to become consistent with directions from stable Europe, while those of younger age do not require such rotation. On a finer scale, the remanent directions can be used to ascertain the probable tectonic tilt at different times of the igneous activity and hence provide intermediate evidence on the tectonic evolution of this area, including rotations of individual tectonic blocks about both vertical and horizontal axes. Fil:Rapalini, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. SER info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03058719_v105_n_p111_Pereira |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
Samples of igneous rocks (36 sites, 218 samples) associated with two main phases of the evolution of the Lusitanian Basin can be dated magnetically to latest Jurassic-early Cretaceous or late Cretaceous-Eocene. Directions of remanence in rocks belonging to the older phase require a 35° rotation to become consistent with directions from stable Europe, while those of younger age do not require such rotation. On a finer scale, the remanent directions can be used to ascertain the probable tectonic tilt at different times of the igneous activity and hence provide intermediate evidence on the tectonic evolution of this area, including rotations of individual tectonic blocks about both vertical and horizontal axes. |
| format |
SER |
| author |
Pereira, J.L. Rapalini, A. Tarling, D.H. Fonseca, J. |
| spellingShingle |
Pereira, J.L. Rapalini, A. Tarling, D.H. Fonseca, J. Palaeomagnetic dating and determination of tectonic tilting: A study of Mesozoic-Cenozoic igneous rocks in central West Portugal |
| author_facet |
Pereira, J.L. Rapalini, A. Tarling, D.H. Fonseca, J. |
| author_sort |
Pereira, J.L. |
| title |
Palaeomagnetic dating and determination of tectonic tilting: A study of Mesozoic-Cenozoic igneous rocks in central West Portugal |
| title_short |
Palaeomagnetic dating and determination of tectonic tilting: A study of Mesozoic-Cenozoic igneous rocks in central West Portugal |
| title_full |
Palaeomagnetic dating and determination of tectonic tilting: A study of Mesozoic-Cenozoic igneous rocks in central West Portugal |
| title_fullStr |
Palaeomagnetic dating and determination of tectonic tilting: A study of Mesozoic-Cenozoic igneous rocks in central West Portugal |
| title_full_unstemmed |
Palaeomagnetic dating and determination of tectonic tilting: A study of Mesozoic-Cenozoic igneous rocks in central West Portugal |
| title_sort |
palaeomagnetic dating and determination of tectonic tilting: a study of mesozoic-cenozoic igneous rocks in central west portugal |
| url |
http://hdl.handle.net/20.500.12110/paper_03058719_v105_n_p111_Pereira |
| work_keys_str_mv |
AT pereirajl palaeomagneticdatinganddeterminationoftectonictiltingastudyofmesozoiccenozoicigneousrocksincentralwestportugal AT rapalinia palaeomagneticdatinganddeterminationoftectonictiltingastudyofmesozoiccenozoicigneousrocksincentralwestportugal AT tarlingdh palaeomagneticdatinganddeterminationoftectonictiltingastudyofmesozoiccenozoicigneousrocksincentralwestportugal AT fonsecaj palaeomagneticdatinganddeterminationoftectonictiltingastudyofmesozoiccenozoicigneousrocksincentralwestportugal |
| _version_ |
1782025783721590784 |